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SSC CGL Tier-1 31-08-2016 Solved Paper
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© examsnet.com
Question : 64
Total: 100
The average of makrs of 17 students in an examination was calculated as 71. But it was later found that the mark of one student had been wrongly entered as 65 instead of 56 and another as 24 instead of 50. The correct average is
70
71
72
73
Validate
Solution:
Total correct marks of 17 students
= 17 × 71 – 65 – 24 + 56 + 50
= 1207 – 89 + 106 = 1224
∴ Required correct average
=
1224
17
= 72
© examsnet.com
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